Low-power Complementary Cascode Partial Positive Feedback Operational Transconductance Amplifier

Low values of noise and power along with high values of common mode rejection ratio (CMRR) are desired for Operational Transconductance Amplifier (OTA) for enhancing the performance of the handheld electronic healthcare systems. However, achieving low-noise operation with high CMRR and low-power dissipation (P diss ) is a complex task with conventional design techniques. In this work, low-noise complementary cascode partial positive feedback OTA functioning at ±0.5 V is presented which is implemented in technology node of $0.18\ \ \mu\mathrm{m}$ . The presented OTA has gain of 76.16 dB, gain bandwidth product of 57 kHz, noise of $0.1\ \mu\mathrm{V}/\surd{\text{Hz}}$ at 1 kHz, P diss of 718 nW CMRR of 104.64 dB. Health care, medical and biological electronic systems are expected to be benefitted with presented low-noise OTA.